Is Cheap Gasoline Causing a Burger Bubble?

If you’re wondering where everyone is spending all the cash they’re saving on gasoline, the stock market provides a good hint: burgers, wings, pizza, chili-cheese tots, cheesecakes, venti mocha frappuccinos and ... well you get the drift.

The Standard & Poor’s Supercomposite Restaurants Index of 23 companies is at a record and up about 17 percent from its 2014 low. The best performing shares in the group so far this year are Wendy’s Co., Papa John’s International Inc., Sonic Corp. and Bob Evans Farms Inc., each up more than 12 percent. Not to mention Shake Shack Inc., which more than doubled in its first day of trading last month.